Mavic Ksyrium Pro Road Wheelset (UST)The Mavic Ksyrium Pro Road Wheelset (UST) is adept on fast rolling roads or mountain terrain; delivering comfort, performance and exceptional rim brake performance in all riding conditions. The UST Tubeless Ready technology this Ksyrium Pro has allows for use with tubeless tyre systems, increasing rolling efficiency whilst producing extra grip and traction, reducing weight, and largely eradicating the possibility of getting a flat tyre.Quicker Acceleration, Higher SpeedThis wheelset features ISM 4D technology, an exclusive Mavic patented concept, ISM 4D significantly reduces weight and inertia without compromising durability. Quicker acceleration, better handling and more resistance; the right mix to make the most of any ride. The smooth profile also helps to reduce aerodynamic drag for higher speed.Features:Rims: Material: Maxtal Drilling: Fore Rim Height: Front: 24mm; Rear: 26mm asymmetrical Rim Width Internal: 17mm Valve Hole Diameter: 6.5mm Tyre: Clincher UST Tubeless, Tubetype Brake Track: UB Control Joint: SUP ETRTO: 622x19TC Road Weight Reduction: ISM 4DSpokes: Material: Zicral Shape: Straight pull, bladed; Front: Double butted Nipples: Fore Count: Front: 18; Rear: 20 Lacing: Front: Radial; Rear: IsopulseHubs: Front & Rear Hub Body: Aluminium Axle material: Aluminium Sealed cartridge bearings Freewheel: Instant Drive 360Weight: Pair: 1.42kg Front: 605g Rear: 815gTechnologies: Instant Drive 360: The new Instant Drive 360 freewheel system is super light and fast to engage with only 9° of engagement. A large contactless rubber seal provides low friction, while a wide array of end caps makes it super versatile. UST Tubeless Ready: The UST concept improves traction, control and comfort while reducing inertia and flats. The Tubeless Ready construction results in a lighter tyre for improved performance. SUP (Soudé Usiné Process): After bending, the rim joint is arc welded. The welded seam is then milled for a smooth finish. UB Control: The braking surfaces are precisely CNC machined to ensure consistent and reliable braking control. ISOPULSE: The spokes are laced radially on the drive side and crossed 2 on the non-drive side to maximise drive side dish, thus providing a better spoke tension balance between left and right flanges. MAXTAL: Exclusive to Mavic, this specific aluminium alloy offers a higher strength to weight ratio than conventional 6106 alloy. ISM 4D (Inter Spoke Milling 4 Dimensions): An exclusive Mavic patented concept, ISM 4D significantly reduces weight and inertia without compromising durability. Quicker accelerations, better handling and more resistance; the right mix to make the most of any ride. The smooth profile also helps reducing aerodynamic drag. ZICRAL: A specific aluminium alloy that provides spokes with a higher stiffness-to-weight ratio while being stronger. FORE: Instead of being drilled, the lower rim bridge is pushed up on the inside, then threaded to enable the spoke nipples to be directly screwed in, leaving the upper rim bridge intact. QRM (Qualité de Roulements Mavic): Mavic only uses high quality sealed cartridge bearings. On QRM wheels, they feature double sealing (2RS or LLU) together with tight C3 internal clearance.ISOPULSE: The spokes are laced radially on the drive side and crossed 2 on the non-drive side to maximise drive side dish, thus providing a better spoke tension balance between left and right flanges.Buy Mavic Wheels & Tyres from Chain Reaction Cycles, the World’s Largest Online Bike Store.